| Message ID | 1463155554-11747-3-git-send-email-benjamin.tissoires@redhat.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
diff --git a/drivers/input/misc/soc_button_array.c b/drivers/input/misc/soc_button_array.c index bbd433c..5467d04 100644 --- a/drivers/input/misc/soc_button_array.c +++ b/drivers/input/misc/soc_button_array.c @@ -167,6 +167,11 @@ static int soc_button_probe(struct platform_device *pdev) button_info = (struct soc_button_info *)id->driver_data; + if (gpiod_count(&pdev->dev, KBUILD_MODNAME) <= 0) { + dev_info(&pdev->dev, "no GPIO attached, ignoring...\n"); + return -ENODEV; + } + priv = devm_kzalloc(&pdev->dev, sizeof(*priv), GFP_KERNEL); if (!priv) return -ENOMEM;
The PNP0C40 device of the Surface 3 doesn't have any GPIO attached to it. Instead of trying to access the GPIO, request the count beforehand and bail out if it is null or if an error is returned. Signed-off-by: Benjamin Tissoires <benjamin.tissoires@redhat.com> --- changes in v2: - hunk moved down for better integration with later patches drivers/input/misc/soc_button_array.c | 5 +++++ 1 file changed, 5 insertions(+)